Valve Guide Seal: Service and Repair

Valve stem seals, replacing

Cylinder head installed
- Remove ribbed belt. Service and Repair
- Remove toothed belt. Service and Repair
- Remove camshafts. Service and Repair
- Remove lifters and place them down with contact surface downward. Ensure that lifters are not interchanged.
- Remove spark plugs.
- Set piston of relevant cylinder to bottom dead center.

Note: Tight cotters can be released by tapping lightly on the valve lever with a hammer.

Exhaust side

Note: Before attaching the valve assembly appliance, remove the two studs in the center of the cylinder head and the three upper studs (inlet side) for securing the cylinder head cover.

- Screw pressure hose VW 653/3 with sealing ring finger-tight into spark plug thread of relevant cylinder, and maintain a constant pressure of at least 6 bar.





- Attach valve assembly appliance 2036 as illustrated: use M6 x 40 bolts with large washers.
- Remove valve spring using valve lever VW 541/1 and thrust piece VW 541/5.
- Take out valve spring and valve spring plate.
- Pull off valve stem seal with 3047 A.





- To prevent damage to new valve stem seals, place plastic sleeve -A- on the valve stem.
- Lightly oil sealing lip.
- Insert valve stem seal -B- (without oiling outside of seal) into fitting tool 3129 and carefully push it down onto valve guide.

Note: When fitting new valves, lightly oil valve stems before installing.

Inlet side

Note: The inlet valves are installed in the cylinder head at different angles.





Valve spring compressor 3362 can be set accordingly to two different positions:
1. Upper position for center valve
2. Lower position for the two outer valves
3. Threads on each side to take M6 x 25 bolts for securing spring compressor to cylinder head





- Mount spring compressor 3362 on cylinder head with two bolts supplied, as in illustration.
- Screw pressure hose VW 653/3 with sealing ring finger-tight into spark plug thread of relevant cylinder, and maintain a constant pressure of at least 6 bar.
- Set position of spring compressor for relevant valve, and remove valve spring using threaded spindle.





- Pull off valve stem seal using 3364.





- To prevent damage to new valve stem seals, place plastic sleeve -A- on valve stem.
- Lightly lubricate sealing lip with oil.
- Insert valve stem seal -B- (without oiling outside of seal) into fitting tool 3365 and carefully push it down onto the valve guide.

Note: When fitting new valves, lightly oil valve stems before installing.

Reworking valves
Valves must not be reworked. Only grinding-in (lapping) is permitted.

WARNING: Note precautions required when disposing of sodium-cooled exhaust valves